Broadcast Encryption Scheme for V2I Communication in VANETs

Information dissemination in vehicular ad hoc networks (VANETs) is inseparable from the interaction between vehicles and infrastructure. The trust authority (TA) often plays a pivotal role VANETs requires with multiple vehicles. However, when TA sends same message to vehicles, there are many redundancies, as it needs negotiate each vehicle send them different ciphertexts. This greatly reduces work efficiency of TA. To best our knowledge, no research on problem redundancy that occurs sent VANETs. proposed scheme adopts identity-based broadcast encryption (IBBE) technology, which secure data-sharing suitable for vehicle-to-infrastructure communication mode, first time. Thus, only one encryption, can generate fixed-length ciphertext group When new subsequently request service, assign tasks proxy server. In terms security, meets particular requirements overhead sender length were comparatively analyzed. results demonstrated performance improved significantly. prevent redundancies effectively improve